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AnnyKZ [126]
3 years ago
14

1. How is the atom count for each element on the reactant side of a balanced chemical equation related to the atom count for eac

h element on the product side of the same equation?
Chemistry
1 answer:
lbvjy [14]3 years ago
5 0

Answer: The atom count for each element on the reactant side of a balanced chemical equation is equal to the atom count for each element on the product side of the same equation

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

2H_2+O_2\rightarrow 2H_2O

Thus there are 4 atoms of hydrogen on reactant as well as product side.

Also there are 2 atoms of oxygen on reactant as well as product side.

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3 0
3 years ago
The reason it takes so much heat to melt ice or evaporate water is that extra energy is required to break _______ bonds between
mart [117]

It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

<h3>Hydrogen bond</h3>

Hydrogen bonding is an electrostatic force of attraction between a hydrogen atom found between a pair of other atoms having a high affinity for electrons.

Hydrogen bonds cause water to be exceptionally attracted to each other creating cohesion.

It takes so much heat to melt ice or evaporate water because extra energy is required to break the hydrogen bonds between water molecules.

Find out more on Hydrogen bond at: brainly.com/question/12798212

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2 years ago
Help!! I’m torn between A and D!! APEX!!!!!!!!!!!!!!!!!
Sveta_85 [38]

Answer:

la constante d'équilibre changerait

Explanation:

5 0
3 years ago
Which one of the following is a redox reaction?
AleksAgata [21]

3Mg(s) + 2FeCl3(aq) → 3 MgCl2(aq) + 2Fe(s)

Explanation:

Redox reaction is a reduction-oxidation reaction in which oxidation states of atoms involved in the reaction are changed. The elements that receive electrons are considered to be reduced while the element that donates the electrons is considered to be oxidized. In the case of this reaction, Fe in the FeCl₃ is reduced into Fe by gaining 3 electrons - while Mg is oxidized to MgCl₂ because it donates 2 electrons.

If you check the moles of Mg, FeCl₃, Fe, and MgCl₂; you'll get to notice that the exchange of electron is balanced at 6.

8 0
3 years ago
A solution of NaCl (aq) is added slowly to a solution of lead nitrate, Pb(NO3)2 ( aq ), until no further precipitation occurs. T
Feliz [49]

Answer:

0.19615 M

Explanation:

Calculation of the moles of PbCl_2 as:-

Mass = 10.91 g

Molar mass of PbCl_2 = 278.1 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{10.91\ g}{278.1\ g/mol}

Moles= 0.03923\ mol

According to the reaction shown below:-

Pb(NO_3)_2_{(aq)} + 2NaCl_{(aq)}\rightarrow PbCl_2_{(s)} + 2NaNO_3_{(aq)}

1 mole of PbCL_2 is produced when 1 mole of Pb(NO_3)_2 undergoes reaction.

0.03923 mole of PbCL_2 is produced when 0.03923 mole of Pb(NO_3)_2 undergoes reaction.

Mole of Pb(NO_3)_2 = 0.03923 mole

Volume = 200.0 mL = 0.2 L ( 1 mL = 0.001 L )

Molarity is defined as the number of moles present in one liter of the solution. It is basically the ratio of the moles of the solute to the liters of the solution.

The expression for the molarity, according to its definition is shown below as:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

So,

Molarity=\frac{0.03923}{0.2}\ M= 0.19615\ M

<u>0.19615 M is the molarity of the Pb(NO_3)_2 solution.</u>

5 0
4 years ago
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